OK, let's crack this. We're given 844 and our task is to multiply it by 171. Essentially, we'll be adding 844 to itself 171 times.
Step 1: 0 + 844 = 844
Step 2: 844 + 844 = 1688
Step 3: 1688 + 844 = 2532
Step 4: 2532 + 844 = 3376
Step 5: 3376 + 844 = 4220
Step 6: 4220 + 844 = 5064
Step 7: 5064 + 844 = 5908
Step 8: 5908 + 844 = 6752
Step 9: 6752 + 844 = 7596
Step 10: 7596 + 844 = 8440
Step 11: 8440 + 844 = 9284
Step 12: 9284 + 844 = 10128
Step 13: 10128 + 844 = 10972
Step 14: 10972 + 844 = 11816
Step 15: 11816 + 844 = 12660
Step 16: 12660 + 844 = 13504
Step 17: 13504 + 844 = 14348
Step 18: 14348 + 844 = 15192
Step 19: 15192 + 844 = 16036
Step 20: 16036 + 844 = 16880
Step 21: 16880 + 844 = 17724
Step 22: 17724 + 844 = 18568
Step 23: 18568 + 844 = 19412
Step 24: 19412 + 844 = 20256
Step 25: 20256 + 844 = 21100
Step 26: 21100 + 844 = 21944
Step 27: 21944 + 844 = 22788
Step 28: 22788 + 844 = 23632
Step 29: 23632 + 844 = 24476
Step 30: 24476 + 844 = 25320
Step 31: 25320 + 844 = 26164
Step 32: 26164 + 844 = 27008
Step 33: 27008 + 844 = 27852
Step 34: 27852 + 844 = 28696
Step 35: 28696 + 844 = 29540
Step 36: 29540 + 844 = 30384
Step 37: 30384 + 844 = 31228
Step 38: 31228 + 844 = 32072
Step 39: 32072 + 844 = 32916
Step 40: 32916 + 844 = 33760
Step 41: 33760 + 844 = 34604
Step 42: 34604 + 844 = 35448
Step 43: 35448 + 844 = 36292
Step 44: 36292 + 844 = 37136
Step 45: 37136 + 844 = 37980
Step 46: 37980 + 844 = 38824
Step 47: 38824 + 844 = 39668
Step 48: 39668 + 844 = 40512
Step 49: 40512 + 844 = 41356
Step 50: 41356 + 844 = 42200
Step 51: 42200 + 844 = 43044
Step 52: 43044 + 844 = 43888
Step 53: 43888 + 844 = 44732
Step 54: 44732 + 844 = 45576
Step 55: 45576 + 844 = 46420
Step 56: 46420 + 844 = 47264
Step 57: 47264 + 844 = 48108
Step 58: 48108 + 844 = 48952
Step 59: 48952 + 844 = 49796
Step 60: 49796 + 844 = 50640
Step 61: 50640 + 844 = 51484
Step 62: 51484 + 844 = 52328
Step 63: 52328 + 844 = 53172
Step 64: 53172 + 844 = 54016
Step 65: 54016 + 844 = 54860
Step 66: 54860 + 844 = 55704
Step 67: 55704 + 844 = 56548
Step 68: 56548 + 844 = 57392
Step 69: 57392 + 844 = 58236
Step 70: 58236 + 844 = 59080
Step 71: 59080 + 844 = 59924
Step 72: 59924 + 844 = 60768
Step 73: 60768 + 844 = 61612
Step 74: 61612 + 844 = 62456
Step 75: 62456 + 844 = 63300
Step 76: 63300 + 844 = 64144
Step 77: 64144 + 844 = 64988
Step 78: 64988 + 844 = 65832
Step 79: 65832 + 844 = 66676
Step 80: 66676 + 844 = 67520
Step 81: 67520 + 844 = 68364
Step 82: 68364 + 844 = 69208
Step 83: 69208 + 844 = 70052
Step 84: 70052 + 844 = 70896
Step 85: 70896 + 844 = 71740
Step 86: 71740 + 844 = 72584
Step 87: 72584 + 844 = 73428
Step 88: 73428 + 844 = 74272
Step 89: 74272 + 844 = 75116
Step 90: 75116 + 844 = 75960
Step 91: 75960 + 844 = 76804
Step 92: 76804 + 844 = 77648
Step 93: 77648 + 844 = 78492
Step 94: 78492 + 844 = 79336
Step 95: 79336 + 844 = 80180
Step 96: 80180 + 844 = 81024
Step 97: 81024 + 844 = 81868
Step 98: 81868 + 844 = 82712
Step 99: 82712 + 844 = 83556
Step 100: 83556 + 844 = 84400
Step 101: 84400 + 844 = 85244
Step 102: 85244 + 844 = 86088
Step 103: 86088 + 844 = 86932
Step 104: 86932 + 844 = 87776
Step 105: 87776 + 844 = 88620
Step 106: 88620 + 844 = 89464
Step 107: 89464 + 844 = 90308
Step 108: 90308 + 844 = 91152
Step 109: 91152 + 844 = 91996
Step 110: 91996 + 844 = 92840
Step 111: 92840 + 844 = 93684
Step 112: 93684 + 844 = 94528
Step 113: 94528 + 844 = 95372
Step 114: 95372 + 844 = 96216
Step 115: 96216 + 844 = 97060
Step 116: 97060 + 844 = 97904
Step 117: 97904 + 844 = 98748
Step 118: 98748 + 844 = 99592
Step 119: 99592 + 844 = 100436
Step 120: 100436 + 844 = 101280
Step 121: 101280 + 844 = 102124
Step 122: 102124 + 844 = 102968
Step 123: 102968 + 844 = 103812
Step 124: 103812 + 844 = 104656
Step 125: 104656 + 844 = 105500
Step 126: 105500 + 844 = 106344
Step 127: 106344 + 844 = 107188
Step 128: 107188 + 844 = 108032
Step 129: 108032 + 844 = 108876
Step 130: 108876 + 844 = 109720
Step 131: 109720 + 844 = 110564
Step 132: 110564 + 844 = 111408
Step 133: 111408 + 844 = 112252
Step 134: 112252 + 844 = 113096
Step 135: 113096 + 844 = 113940
Step 136: 113940 + 844 = 114784
Step 137: 114784 + 844 = 115628
Step 138: 115628 + 844 = 116472
Step 139: 116472 + 844 = 117316
Step 140: 117316 + 844 = 118160
Step 141: 118160 + 844 = 119004
Step 142: 119004 + 844 = 119848
Step 143: 119848 + 844 = 120692
Step 144: 120692 + 844 = 121536
Step 145: 121536 + 844 = 122380
Step 146: 122380 + 844 = 123224
Step 147: 123224 + 844 = 124068
Step 148: 124068 + 844 = 124912
Step 149: 124912 + 844 = 125756
Step 150: 125756 + 844 = 126600
Step 151: 126600 + 844 = 127444
Step 152: 127444 + 844 = 128288
Step 153: 128288 + 844 = 129132
Step 154: 129132 + 844 = 129976
Step 155: 129976 + 844 = 130820
Step 156: 130820 + 844 = 131664
Step 157: 131664 + 844 = 132508
Step 158: 132508 + 844 = 133352
Step 159: 133352 + 844 = 134196
Step 160: 134196 + 844 = 135040
Step 161: 135040 + 844 = 135884
Step 162: 135884 + 844 = 136728
Step 163: 136728 + 844 = 137572
Step 164: 137572 + 844 = 138416
Step 165: 138416 + 844 = 139260
Step 166: 139260 + 844 = 140104
Step 167: 140104 + 844 = 140948
Step 168: 140948 + 844 = 141792
Step 169: 141792 + 844 = 142636
Step 170: 142636 + 844 = 143480
Step 171: 143480 + 844 = 144324

So, 844*171 = 144324